chore: setup e2e test for invalid packet error handling

Author: avallete

Diff for: packages/pg/package.json

@@ -22,7 +22,7 @@
   "dependencies": {
     "pg-connection-string": "^2.7.0",
     "pg-pool": "^3.8.0",
-    "pg-protocol": "^1.8.0",
+    "pg-protocol": "file:../pg-protocol",
     "pg-types": "^2.1.0",
     "pgpass": "1.x"
   },

Diff for: packages/pg/test/integration/connection-pool/error-tests.js

@@ -164,3 +164,31 @@ suite.test('handles socket error during pool.query and destroys it immediately',
     }, 100)
   }
 })
+
+suite.test('unexpected handling packet error emit catchable errors', () => {
+  const pool = new pg.Pool()
+  pool.connect(
+    assert.success((client, done) => {
+      client.once(
+        'error',
+        // After unexpected packed error, the client will receive an unexpected commandComplete message from backend
+        assert.calls((err) => {
+          assert.equal(`${err}`, 'Error: Received unexpected commandComplete message from backend.')
+          done()
+        })
+      )
+      client.query(
+        // Retrieve a field which lenght cannot be handled by JS (+700Mo string)
+        `SELECT repeat('A', 536870889)`,
+        assert.calls((err) => {
+          if (helper.args.native) {
+            assert.ok(err)
+          } else {
+            assert.equal(err.message, 'unexpected error handling packet: Error: Cannot create a string longer than 0x1fffffe8 characters')
+            assert.equal(err.length, 536870899)
+          }
+        })
+      )
+    })
+  )
+})